Three and Six Grams Supplementation of D-Aspartic Acid in Resistance Trained Men
Melville GW, Siegler JC, Marshall PWM
Published in Journal of the International Society of Sports Nutrition
Methodology
Fourteen-day randomized placebo-controlled trial comparing 3 g/day and 6 g/day D-aspartic acid in 24 resistance-trained men.
Key Findings
Total testosterone was unchanged with 3 g/day and significantly decreased with 6 g/day; free testosterone fell in the 6 g group.
Conclusions
D-aspartic acid did not raise testosterone and higher doses may lower it in resistance-trained men.
Limitations
Short duration; small groups; trained men only.
Supplements Studied
Total testosterone was unchanged with 3 g/day and significantly decreased with 6 g/day.
Outcomes Measured
Free testosterone fell in the 6 g/day D-aspartic acid group.
Study Details
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